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Method for exploring and displaying tissue of human or animal origin from a high frequency ultrasound probe

a high-frequency ultrasound and tissue technology, applied in the field of investigation and display, can solve the problems of not being able to allow detailed analysis of the retina and the other layers of the posterior wall of the eye, and achieve the effect of improving the reproduction of information and facilitating interpretation

Inactive Publication Date: 2005-09-27
CENT NAT DE LA RECHERCHE SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]various signal processing operations are carried out on the data coming from the scanning, to improve the reproduction of the information and to facilitate the interpretation thereof by the practitioner.

Problems solved by technology

The major drawback of low-frequency echography is mainly the low resolution (600 to 700 μm) provided by these low frequencies, which do not allow detailed analysis of the retina and the other layers of the posterior wall of the eye (choroid and sclera) and more particularly in the macular region.

Method used

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  • Method for exploring and displaying tissue of human or animal origin from a high frequency ultrasound probe
  • Method for exploring and displaying tissue of human or animal origin from a high frequency ultrasound probe
  • Method for exploring and displaying tissue of human or animal origin from a high frequency ultrasound probe

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Embodiment Construction

[0026]According to a preferred embodiment of the process forming the subject of the invention, of which one system enabling its implementation is shown schematically in FIG. 1, the process consists in positioning an ultrasound probe 1 mounted within a head articulated in three dimensions X, Y, Z, at least one direction of which can be fixed, this head being steered by a servo-controlled positioning system 2, controlled by a computer 3, in particular in a direction perpendicular to the medium to be investigated.

[0027]This ultrasound probe 1 consists mainly of a transducer, in particular one made of PVDF (polyvinylidene difluoride), controlled by a transmitter / receiver 4, in order to generate beams of convergent, broadband, ultrasonic waves, these waves being able to adopt a spherical or linear profile.

[0028]Next, FIG. 2 shows an investigation of the posterior segment of an ocular globe 5, previously inserted into a coupling medium 6 which does not impair the propagation of the waves,...

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Abstract

A method for displaying scanned ultrasound images of tissue employs an apparatus including an ultrasound probe mounted to a mechanical head. A three-dimensional positioning system mounts the head for positioning the probe in proximate orthogonal relation to the tissue. A computer controls the three-dimensional positioning system thereby moving the probe during a scan. The probe transmits high frequency ultrasound waves whose nominal frequency is included within the range from 30 to 100 MHz and with a large pass band, adapted to frequencies reflected by the tissue. The beams of ultrasound transmission are focused in a given zone of the tissue over a vertical penetration distance of between 20 and 30 mm. Reflected signals are acquired and processed for display.

Description

[0001]This application is a 371 of PCT / FR99 / 00040 filed Jan. 12, 1999.FIELD OF THE INVENTION[0002]The present invention relates to a process for the investigation and display, using ultrasound echography techniques, of tissue structures of human or animal origin such as in particular the ocular globes and more particularly of the posterior segment (the vitreous cavity, the posterior wall of the globe lined by the choroid and the retina, the macula), tissue structures of the anterior segment (the cornea, the anterior chamber, the iris and the crystalline lens). The invention also relates to a device and an ultrasound probe which allow this investigation and this display to be achieved in 2D or 3D.BACKGROUND OF THE INVENTION[0003]In ultrasound imaging and more particularly in medical echography, the choice of frequency is dictated by the compromise between resolution and penetration depth. Specifically, because of the increase in attenuation of ultrasound waves with frequency, the pen...

Claims

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Application Information

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IPC IPC(8): A61B8/10A61B3/10
CPCA61B8/10A61B8/4483G01S15/8993
Inventor SAIED, AMENABERGER, GENEVIEVELAUGIER, PASCALPUECH, MICHEL
Owner CENT NAT DE LA RECHERCHE SCI
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